Ok, you can investigate it and make sure Dr Campbell isn't making this stuff up.
Hahaha, you're funny Spaugh. You know that Campbell is not making this up! But it's quite possible that he or Noris Ledesma named it. It's a backyard tree, so doubt many people in Nicaragua know it.
The other story of Pura Vida being a seedling of Russell is the made up story. I'm guessing that came about because the avocado that Miami fruit company is selling is really a Russell, not a Pura Vida.
I hope my Pura Vida tree fruits soon, and will give taste report. It flowered already once but dropped the flowers.